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diff --git a/src/messages/MOSDScrub.h b/src/messages/MOSDScrub.h
new file mode 100644
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+++ b/src/messages/MOSDScrub.h
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+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- 
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software 
+ * Foundation.  See file COPYING.
+ * 
+ */
+
+
+#ifndef CEPH_MOSDSCRUB_H
+#define CEPH_MOSDSCRUB_H
+
+#include "msg/Message.h"
+
+/*
+ * instruct an OSD to scrub some or all pg(s)
+ */
+
+class MOSDScrub final : public Message {
+public:
+  static constexpr int HEAD_VERSION = 2;
+  static constexpr int COMPAT_VERSION = 2;
+
+  uuid_d fsid;
+  std::vector<pg_t> scrub_pgs;
+  bool repair = false;
+  bool deep = false;
+
+  MOSDScrub() : Message{MSG_OSD_SCRUB, HEAD_VERSION, COMPAT_VERSION} {}
+  MOSDScrub(const uuid_d& f, bool r, bool d) :
+    Message{MSG_OSD_SCRUB, HEAD_VERSION, COMPAT_VERSION},
+    fsid(f), repair(r), deep(d) {}
+  MOSDScrub(const uuid_d& f, std::vector<pg_t>& pgs, bool r, bool d) :
+    Message{MSG_OSD_SCRUB, HEAD_VERSION, COMPAT_VERSION},
+    fsid(f), scrub_pgs(pgs), repair(r), deep(d) {}
+private:
+  ~MOSDScrub() final {}
+
+public:
+  std::string_view get_type_name() const override { return "scrub"; }
+  void print(std::ostream& out) const override {
+    out << "scrub(";
+    if (scrub_pgs.empty())
+      out << "osd";
+    else
+      out << scrub_pgs;
+    if (repair)
+      out << " repair";
+    if (deep)
+      out << " deep";
+    out << ")";
+  }
+
+  void encode_payload(uint64_t features) override {
+    using ceph::encode;
+    encode(fsid, payload);
+    encode(scrub_pgs, payload);
+    encode(repair, payload);
+    encode(deep, payload);
+  }
+  void decode_payload() override {
+    using ceph::decode;
+    auto p = payload.cbegin();
+    decode(fsid, p);
+    decode(scrub_pgs, p);
+    decode(repair, p);
+    decode(deep, p);
+  }
+private:
+  template<class T, typename... Args>
+  friend boost::intrusive_ptr<T> ceph::make_message(Args&&... args);
+};
+
+#endif